Electric heater.



(WWW/W11.

G. H. MANSFIELD & C. W. WILD.

ELECTRIC HEATER. APPLICATION FILED APR. 22, 1914.

1,107,333, Patented Aug.18, 1914.

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GEORGE E. MANSFIELD AND CHARLES W. WILD, OE CANTON, OHIO.

ELECTRIC HEATER.

Specification of Letters Patent.

Patented Aug. 18, 1914.

To all whom it may concern:

Be it known that we, GEORGE H. MANS- FIELD and CHARLES W. W1LD, citizensof the United States, residing at Canton, in the county of Stark andState of Ohio, have jointly invented certain new and usefulImprovement-s in Electric Heaters, of which the following is aspecification.

Our invention relates to electric heaters and has for its object toprovide a device of simple construction and economical in use.

A further object of the invention is to pro vide a heating device whichmay be and can be operated at little expense and without anydisagreeable odors.

A further object of the invention is to pro vide means whereby a draftor suction of atmospheric air is taken in below the resistance elementand at the same time means are provided whereby an air Space isproduced, by which arrangement'the shell or casing of the heater. ismaintained at a low degree of temperature.

These objects, together with other objects readily apparent to thoseskilled in the art, we attain by the construction illustrated in theaccompanying drawing; although our invention may be embodied in avariety of other mechanical forms,- the construction illustrated beingchosen by way of example.

In the accompanying drawing: Figure 1 is a perspective view showing thetop plate removed and a portion of the shell or casing broken away. Fig.2 is a vertical section showing the location and arrangement of thedifferent parts, including the top plate not shown in Fig. 1. Fig. 3 isa view showing a portion of the shell or'casing illustrating a portionof the top plate and a portion of the insulating plate illustrating oneof the resistance Wires extended to be properly connected. Fig. 4 is abottom or underside view showing a portion of the casing or shell andalso showing the heat resisting plate in proper position with referenceto the shell or casing.

Similar numerals of reference indicate corresponding parts in all thefigures of the drawing.

In the accompanying drawing, 1 represents the shell or casing, which maybe formed of any size and shape reference being had to the size of theheater designed to be constructed. In the drawings we have shown thecasing circular in form, but other forms may be employed withoutdeparting from the nature of our invention. The shell or casing 1 isdesigned to rest upon suitable supports 2, which may be attached in anyconvenient manner.

For the purpose of holding in proper relative position the top plate 3,the shell or casing 1 is provided with an inwardly extending flange 4 orits equivalent, which forms a support for said plate. Below the flange 4is located the flange 5, which is for the purpose of holding theinsulating plate 6, said insulating plate being preferably formed ofasbestos or the like. The purpose of the insulating plate 6 is toprovide means for carrying and holdin in proper relative position theresistance e ement 7 which resistance element may be arrangedsubstantially as shown in the drawing, or they may be differentlyarranged, but should be so arranged as to form a continuous circuit andthe ends extended to form positive and negative contacts. In thedrawings we have designated these points 8 and 9 and have illustratedthe same in a conventional way as it will be understood that it isimmaterial as to the exact arrangement and location of the ends, theonly object being to provlde means for properly closing the circuit.

For the purpose of providing a convenient means for supplying thecurrent, the positive and negative ends may be extended as shown in Fig.3 and provided with the contact bars 10, which extend beyond the outersurface of the shell or casing 1, which receive the connecting head 11,to which head are attached the ordinary supply wires, WhlCl'l lead toany desired point of contact, whereby a current is conveyed to theheater proper.

In the lower portion of the shell or cas ng 1 is located the heatresisting plate 12, which is supported by the posts 13 or theirequivalents, which posts are connected to the shell or casing. Below theheat res stlng plate 12 is located the air intake opening 14, which isformed of such a size to allow a sufliclent amount of atmospheric air toenter to create the proper draft. Above the heat resist ng plate 12 islocated the a1r deflector 15, which is preferably formed saucer shape,or convexo-concave, which deflector is for the purpose of deflecting theair upward toward the resistance element and heat generating elements.To allow for the proper passage of air after it has entered the intakeopenmg 14, the deflector plate 15 is sufliciently spaced from theresistance or heating element to provide suitable air space. For thepurpose of assisting in directing the atmospheric air upward and towardthe heating elements 7 the apron 16 is provided, which apron is disposedpreferably between the insulating plate 6 and the sides or bottom of theshell or casing 1, the arrangement being such as to cause a continuityof the draft entering the opening and emerging at the top through theheating element. The apron 16 is spaced a short distance from the innersurface of the shell 1, best illustrated in Fig. 2, where by an-airchamber is provided between said apron and shell or casing 1, to act asa safeguard against any heated air which through any means may find itsway to the inside of the shell or casing, whereby the shell or casing ismaintained in a cool condition.

By locating the heat resisting plate 12 as shown or substantially asshown, the heat will be prevented from moving in a downward direction,or in other words cutting off the heat so that the heater proper can beplaced upon a table or other object without danger of injuring orscorching the table or other object upon which the heater may beplaced.

Having fully described our invention what we claim as new and desire tosecure by Letters Patent, is

1. In an electric heater, a casing provided with an air intake opening,the top portion thereof provided with flanges spaced from each otherandeits bottom provided with an air intake opening, a heating plateadapted to be supported by one of the inward extending flanges, aninsulating plate located below the heating plate and provided withresistance elements arranged to form a continuous circuit, an airdeflector located below the insulating late and the resistance elements,said de ector plate spaced from the heating elements and a heatresistance plate located between the air deflector and the intakeopening.

2. .In an electric heater, a casing provided with an air intake opening,the top portion thereof provided with flanges spaced from each other andits bottom provided with an air intake opening, a heating plate adaptedto be supported by one of the inward extending flanges, an insulatingplate located below the heating plate and provided with resistanceelements arranged to form a continuous circuit, an air deflector locatedbelow the insulating plate and the resistance elements, said deflectorplate spaced from the heating elements and a heat resistance platelocated between the air deflector and the intake opening, and an apronconnected to and car,- ried by the insulating plate, said apron locatedaround the deflector and heat resisting plate.

3. In an electric heater, the combination of a casing, said casingprovided with an air intake opening, an insulating plate, resistanceelements carried by said insulating plate, an air deflector locatedbelow the insulating plate and resistance elements, said deflector platespaced from said insulating plate and an apron located below theinsulating plate, a heat resisting plate located below the deflector andspaced from the air intake opening.

4. In an electric heater a casing provided with an air intake opening, aheat resisting plate spaced from the air intake opening in the casing,an insulating plate adapted to be supported by the casing, saidinsulating plate having connected thereto a heating element and areflector plate located intermediate the insulating plate and heatresisting plate.

In testimony that we claim the above, we have hereunto subscribed ournames in the presence of two witnesses.

GEORGE H. MANSFIELD. CHARLES w. WILD.

Witnesses:

SYLvIA BoRoN, F. W. Bonn.

